package servlets.module.challenge;

import dbProcs.Getter;
import dbProcs.Setter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Locale;
import java.util.ResourceBundle;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import utils.ShepherdLogManager;
import utils.Validate;

/**
 * Cross Site Request Forgery Challenge Five - Does not return result Key <br>
 * <br>
 * This file is part of the Security Shepherd Project.
 *
 * <p>The Security Shepherd project is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.<br>
 *
 * <p>The Security Shepherd project is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU General Public License for more details.<br>
 *
 * <p>You should have received a copy of the GNU General Public License along with the Security
 * Shepherd project. If not, see <http://www.gnu.org/licenses/>.
 *
 * @author Mark Denihan
 */
public class CsrfChallengeFive extends HttpServlet {

  private static final long serialVersionUID = 1L;
  private static final Logger log = LogManager.getLogger(CsrfChallengeFive.class);
  private static final String levelHash =
      "70b96195472adf3bf347cbc37c34489287969d5ba504ac2439915184d6e5dc49";
  private static String levelName = "CSRF Challenge 5";

  /**
   * Allows users to set their CSRF attack string to complete this module. They should be using this
   * to force users to visit their own pages that forces the victim to submit a post request to the
   * CSRFChallengeTargetFive
   *
   * @param myMessage To Be stored as the users message for this module
   */
  public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    // Setting IpAddress To Log and taking header for original IP if forwarded from proxy
    ShepherdLogManager.setRequestIp(request.getRemoteAddr(), request.getHeader("X-Forwarded-For"));
    log.debug(levelName + " Servlet");

    // Translation Stuff
    Locale locale = new Locale(Validate.validateLanguage(request.getSession()));
    ResourceBundle errors = ResourceBundle.getBundle("i18n.servlets.errors", locale);
    ResourceBundle csrfGenerics =
        ResourceBundle.getBundle("i18n.servlets.challenges.csrf.csrfGenerics", locale);

    PrintWriter out = response.getWriter();
    out.print(getServletInfo());
    try {
      HttpSession ses = request.getSession(true);
      if (Validate.validateSession(ses)) {
        ShepherdLogManager.setRequestIp(
            request.getRemoteAddr(),
            request.getHeader("X-Forwarded-For"),
            ses.getAttribute("userName").toString());
        log.debug(levelName + " servlet accessed by: " + ses.getAttribute("userName").toString());
        Cookie tokenCookie = Validate.getToken(request.getCookies());
        Object tokenParmeter = request.getParameter("csrfToken");
        if (Validate.validateTokens(tokenCookie, tokenParmeter)) {
          String myMessage = request.getParameter("myMessage");
          log.debug("User Submitted - " + myMessage);
          myMessage = Validate.makeValidUrl(myMessage);

          log.debug("Updating User's Stored Message");
          String ApplicationRoot = getServletContext().getRealPath("");
          String moduleId =
              Getter.getModuleIdFromHash(ApplicationRoot, CsrfChallengeFive.levelHash);
          String userId = (String) ses.getAttribute("userStamp");
          Setter.setStoredMessage(ApplicationRoot, myMessage, userId, moduleId);

          log.debug("Retrieving user's class's forum");
          String classId = null;
          if (ses.getAttribute("userClass") != null) {
            classId = (String) ses.getAttribute("userClass");
          }
          String htmlOutput =
              Getter.getCsrfForumWithIframe(ApplicationRoot, classId, moduleId, csrfGenerics);

          log.debug("Outputting HTML");
          out.write(htmlOutput);
        }
      }
    } catch (Exception e) {
      out.write(errors.getString("error.funky"));
      log.fatal(levelName + " - " + e.toString());
    }
  }
}
